Fixes bit order argument for ESP32 and ESP8266

v1.0.3

Changes bit order parameter to `MSBFIRST` for ESP32 and ESP8266 platf…

Removes deprecated SPI functions and fixes minor bugs

This release removes SPI functions like setBitOrder() and replaces them with the SPISettings class. It also fixes a number of typos, some that broke functionality and other minor ones like incorrect comments.

ESP32 and ESP8266 SPI compatibility

This minor patch simply adds compatibility for the ESP32 and ESP8266 when using the Serial Peripheral Interface (SPI) with this product.